Controlled atmosphere fresh-keeping cellar

The invention relates to the technical field of fresh-keeping storage equipment, in particular to a modified atmosphere fresh-keeping cellar. Comprising an underground cellar body and an operation room, the cellar body comprises four wall bodies, a floor and an arched cellar top; an air-tight door is mounted on the wall body between the cellar body and the operation room; a step ladder, a lifting goods elevator and an equipment control room are arranged in the operation room; and an equipment control system is arranged in the equipment control chamber. The system mainly comprises a cellar body and an equipment control system, wherein the equipment control system comprises a refrigerating system, an air conditioning system and an electric power system; the cellar warehouse body is arranged underground, the temperature is constant throughout the year, the operation cost is reduced, the fresh-keeping effect is better, cultivated land is not occupied, land is saved, the construction period is short, the cost is l